Data/hora: 18/05/2024 14:54:20

Provedor de dados: 	Scientia Agricola	
País: 	Brazil	
Título: 	Depression by inbreeding after four sucessive self-pollination squash generations	
Autores: 	Cardoso,Antonio Ismael Inácio.	
Data: 	2004-04-01	
Ano: 	2004	
Palavras-chave: 	Cucurbita moschata; Cucurbits; Selfing.	
Resumo: 	The strategy for breeding F1 hybrid squash is to develop parental lines through self-pollination. However, it increases plant mean homozygosis, which is not the natural genetic state of a cross-pollinated species, and can cause "inbreeding depression". The objective of this work was to evaluate this depression with sucessive generations of self-pollination (without selection) in Cucurbita moschata, cv. Piramoita. Populations were obtained from lines with one to four generations of self-pollination (obtained by the SSD method), from the original cv. Piramoita (population S0). Randomized blocks were used with five treatments (different generations of self-pollination - S0 to S4), six replicates and five plants per plot. Regression analysis was made by the Wright inbreeding coefficient (F) to measure the homozygosis level effect on vigor loss. There was a linear reduction of mean weight and fruit length, seed production (number and weight) per fruit with the increase of the homozygosis level; however inbreeding did not affect seed quality (weight of 100 seeds and germination).	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000200016	
Editor: 	São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"	
Relação: 	10.1590/S0103-90162004000200016	
Formato: 	text/html	
Fonte: 	Scientia Agricola  v.61 n.2 2004	
Fonte: 	info:eu-repo/semantics/openAccess